0 to (cause something to) change from the original color and therefore to look unpleasant:
1 to cause a substance or material to change from its original color when you do not want it to:
Type 304 is also commonly used with formic acid though it will tend to discolor the solution.
In some cases it will also discolor stained or coated surfaces.
These pigmented fungi discolor wood, producing cosmetic damage that makes it less marketable.
Similarly, water-based highlighter markers can blur inkjet-printed documents and discolor the highlighter's tip.
When iron supplements are given in a liquid form, teeth may reversibly discolor (this can be avoided through the use of a straw).
Internal staining of dentin can discolor the teeth from inside out.
The disease causes the needles of the tree to discolor and eventually fall from the tree.
The specific name "discolor" refers to the difference in colour of the top and bottom leaf surfaces.
